Sony Ericsson MBR-100 Bluetooth device

The Sony Ericsson MBR-100 is a little device that lets you listen to the music from your handset on a decent Hi-Fi system or PC w/o any wires.

All you have to do is connect it to a compatible cellphone (only A2DP-enabled cellphones need apply) via Bluetooth and that's it. It can also connect to wired headphones if needed.

But for a price of GBP 40 you can simply buy four Bluetooth dongles that do the same job (only on a PC platform).